diff options
Diffstat (limited to 'vnet/vnet/l2/l2_output.h')
| -rw-r--r-- | vnet/vnet/l2/l2_output.h | 277 |
1 files changed, 154 insertions, 123 deletions
diff --git a/vnet/vnet/l2/l2_output.h b/vnet/vnet/l2/l2_output.h index b525a745ba7..e29d32d4222 100644 --- a/vnet/vnet/l2/l2_output.h +++ b/vnet/vnet/l2/l2_output.h @@ -24,59 +24,70 @@ #include <vnet/l2/l2_vtr.h> -// The L2 output feature configuration, a per-interface struct -typedef struct { +/* The L2 output feature configuration, a per-interface struct */ +typedef struct +{ u32 feature_bitmap; - // vlan tag rewrite for ingress and egress - // ingress vtr is located here because the same config data is used for - // the egress EFP filter check + /* + * vlan tag rewrite for ingress and egress + * ingress vtr is located here because the same config data is used for + * the egress EFP filter check + */ vtr_config_t input_vtr; vtr_config_t output_vtr; - // some of these flags may get integrated into the feature bitmap - u8 fwd_enable; - u8 flood_enable; + /* some of these flags may get integrated into the feature bitmap */ + u8 fwd_enable; + u8 flood_enable; - // split horizon group - u8 shg; + /* split horizon group */ + u8 shg; } l2_output_config_t; -// The set of next nodes for features and interface output. -// Each output feature node should include this. -typedef struct { - // vector of output next node index, indexed by sw_if_index. - // used when all output features have been executed and the - // next nodes are the interface output nodes. - u32 * output_node_index_vec; - - // array of next node index for each output feature, indexed - // by l2output_feat_t. Used to determine next feature node. +/* + * The set of next nodes for features and interface output. + * Each output feature node should include this. + */ +typedef struct +{ + /* + * vector of output next node index, indexed by sw_if_index. + * used when all output features have been executed and the + * next nodes are the interface output nodes. + */ + u32 *output_node_index_vec; + + /* + * array of next node index for each output feature, indexed + * by l2output_feat_t. Used to determine next feature node. + */ u32 feat_next_node_index[32]; } l2_output_next_nodes_st; -typedef struct { - // Next nodes for features and output interfaces +typedef struct +{ + /* Next nodes for features and output interfaces */ l2_output_next_nodes_st next_nodes; /* config vector indexed by sw_if_index */ l2_output_config_t *configs; /* Convenience variables */ - vlib_main_t * vlib_main; - vnet_main_t * vnet_main; + vlib_main_t *vlib_main; + vnet_main_t *vnet_main; } l2output_main_t; l2output_main_t l2output_main; -// L2 output features +/* L2 output features */ -// Mappings from feature ID to graph node name +/* Mappings from feature ID to graph node name */ #define foreach_l2output_feat \ _(SPAN, "feature-bitmap-drop") \ _(CFM, "feature-bitmap-drop") \ @@ -89,21 +100,23 @@ l2output_main_t l2output_main; _(LINESTATUS_DOWN, "feature-bitmap-drop") \ _(XCRW, "l2-xcrw") -// Feature bitmap positions -typedef enum { +/* Feature bitmap positions */ +typedef enum +{ #define _(sym,str) L2OUTPUT_FEAT_##sym##_BIT, foreach_l2output_feat #undef _ - L2OUTPUT_N_FEAT, + L2OUTPUT_N_FEAT, } l2output_feat_t; -// Feature bit masks -typedef enum { +/* Feature bit masks */ +typedef enum +{ #define _(sym,str) L2OUTPUT_FEAT_##sym = (1<<L2OUTPUT_FEAT_##sym##_BIT), foreach_l2output_feat #undef _ } l2output_feat_masks_t; - + #define foreach_l2output_error \ _(L2OUTPUT, "L2 output packets") \ _(EFP_DROP, "L2 EFP filter pre-rewrite drops") \ @@ -111,128 +124,146 @@ _(VTR_DROP, "L2 output tag rewrite drops") \ _(SHG_DROP, "L2 split horizon drops") \ _(DROP, "L2 output drops") -typedef enum { +typedef enum +{ L2OUTPUT_NEXT_DROP, L2OUTPUT_NEXT_DEL_TUNNEL, L2OUTPUT_N_NEXT, } l2output_next_t; -typedef enum { +typedef enum +{ #define _(sym,str) L2OUTPUT_ERROR_##sym, foreach_l2output_error #undef _ - L2OUTPUT_N_ERROR, + L2OUTPUT_N_ERROR, } l2output_error_t; -// Return an array of strings containing graph node names of each feature -char **l2output_get_feat_names(void); +/* Return an array of strings containing graph node names of each feature */ +char **l2output_get_feat_names (void); -// The next set of functions is for use by output feature graph nodes. -// When the last bit has been cleared from the output feature bitmap, -// the next node is the output graph node for the TX sw_if_index. -// These functions help the feature nodes get that node index. +/** + * The next set of functions is for use by output feature graph nodes. + * When the last bit has been cleared from the output feature bitmap, + * the next node is the output graph node for the TX sw_if_index. + * These functions help the feature nodes get that node index. + */ -// Create a mapping to the output graph node for the given sw_if_index -u32 l2output_create_output_node_mapping ( - vlib_main_t * vlib_main, - vnet_main_t * vnet_main, - u32 node_index, // index of current node - u32 * output_node_index_vec, - u32 sw_if_index); +/* Create a mapping to the output graph node for the given sw_if_index */ +u32 l2output_create_output_node_mapping (vlib_main_t * vlib_main, vnet_main_t * vnet_main, u32 node_index, /* index of current node */ + u32 * output_node_index_vec, + u32 sw_if_index); -// Initialize the next node mapping table -always_inline -void l2output_init_output_node_vec (u32 **output_node_index_vec) { +/* Initialize the next node mapping table */ +always_inline void +l2output_init_output_node_vec (u32 ** output_node_index_vec) +{ - // Size it at 100 sw_if_indexes initially - // Uninitialized mappings are set to ~0 - vec_validate_init_empty(*output_node_index_vec, 100, ~0); + /* + * Size it at 100 sw_if_indexes initially + * Uninitialized mappings are set to ~0 + */ + vec_validate_init_empty (*output_node_index_vec, 100, ~0); } -// Get a mapping from the output node mapping table, -// creating the entry if necessary. -always_inline -u32 l2output_get_output_node (vlib_main_t * vlib_main, - vnet_main_t * vnet_main, - u32 node_index, // index of current node - u32 sw_if_index, - u32 ** output_node_index_vec) // may be updated +/** + * Get a mapping from the output node mapping table, + * creating the entry if necessary. + */ +always_inline u32 +l2output_get_output_node (vlib_main_t * vlib_main, vnet_main_t * vnet_main, u32 node_index, /* index of current node */ + u32 sw_if_index, u32 ** output_node_index_vec) /* may be updated */ { - u32 next; // index of next graph node - - // Insure the vector is big enough - vec_validate_init_empty(*output_node_index_vec, sw_if_index, ~0); - - // Get the mapping for the sw_if_index - next = vec_elt(*output_node_index_vec, sw_if_index); - - if (next == ~0) { - // Mapping doesn't exist so create it - next = l2output_create_output_node_mapping (vlib_main, - vnet_main, - node_index, - *output_node_index_vec, - sw_if_index); - } + u32 next; /* index of next graph node */ + + /* Insure the vector is big enough */ + vec_validate_init_empty (*output_node_index_vec, sw_if_index, ~0); + + /* Get the mapping for the sw_if_index */ + next = vec_elt (*output_node_index_vec, sw_if_index); + + if (next == ~0) + { + /* Mapping doesn't exist so create it */ + next = l2output_create_output_node_mapping (vlib_main, + vnet_main, + node_index, + *output_node_index_vec, + sw_if_index); + } return next; } -// Determine the next L2 node based on the output feature bitmap +/** Determine the next L2 node based on the output feature bitmap */ always_inline void l2_output_dispatch (vlib_main_t * vlib_main, - vnet_main_t * vnet_main, - vlib_node_runtime_t * node, - u32 node_index, - u32 * cached_sw_if_index, - u32 * cached_next_index, - l2_output_next_nodes_st *next_nodes, - vlib_buffer_t * b0, - u32 sw_if_index, - u32 feature_bitmap, - u32 *next0) + vnet_main_t * vnet_main, + vlib_node_runtime_t * node, + u32 node_index, + u32 * cached_sw_if_index, + u32 * cached_next_index, + l2_output_next_nodes_st * next_nodes, + vlib_buffer_t * b0, + u32 sw_if_index, u32 feature_bitmap, u32 * next0) { - if (feature_bitmap) { - // There are some features to execute - - // Save bitmap for the next feature graph nodes - vnet_buffer(b0)->l2.feature_bitmap = feature_bitmap; - - // Determine the next node - *next0 = feat_bitmap_get_next_node_index(next_nodes->feat_next_node_index, - feature_bitmap); - } else { - // There are no features. Send packet to TX node for sw_if_index0 - // This is a little tricky in that the output interface next node indexes - // are not precomputed at init time. - - if (sw_if_index == *cached_sw_if_index) { - // We hit in the one-entry cache. Use it. - *next0 = *cached_next_index; - } else { - // Look up the output TX node - *next0 = l2output_get_output_node(vlib_main, - vnet_main, - node_index, - sw_if_index, - &next_nodes->output_node_index_vec); - - // Update the one-entry cache - *cached_sw_if_index = sw_if_index; - *cached_next_index = *next0; + if (feature_bitmap) + { + /* There are some features to execute */ + + /* Save bitmap for the next feature graph nodes */ + vnet_buffer (b0)->l2.feature_bitmap = feature_bitmap; + + /* Determine the next node */ + *next0 = + feat_bitmap_get_next_node_index (next_nodes->feat_next_node_index, + feature_bitmap); + } + else + { + /* + * There are no features. Send packet to TX node for sw_if_index0 + * This is a little tricky in that the output interface next node indexes + * are not precomputed at init time. + */ + + if (sw_if_index == *cached_sw_if_index) + { + /* We hit in the one-entry cache. Use it. */ + *next0 = *cached_next_index; + } + else + { + /* Look up the output TX node */ + *next0 = l2output_get_output_node (vlib_main, + vnet_main, + node_index, + sw_if_index, + &next_nodes->output_node_index_vec); + + /* Update the one-entry cache */ + *cached_sw_if_index = sw_if_index; + *cached_next_index = *next0; + } } - } } -// Get a pointer to the config for the given interface -l2_output_config_t * l2output_intf_config (u32 sw_if_index); +/** Get a pointer to the config for the given interface */ +l2_output_config_t *l2output_intf_config (u32 sw_if_index); -// Enable (or disable) the feature in the bitmap for the given interface +/** Enable (or disable) the feature in the bitmap for the given interface */ void l2output_intf_bitmap_enable (u32 sw_if_index, - u32 feature_bitmap, - u32 enable); + u32 feature_bitmap, u32 enable); #endif + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |